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Check Clock System Communication Circuit

DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK POWER SUPPLY. 
  1. Disconnect the MFD connector.
  2. Turn the ignition switch to ON.
  3. Measure the voltage between MFD connector and chassis ground.

    Connector & terminal 

    (i122) No. 3 (+) - Chassis ground (-): 

 Is the voltage 10 V or more? Go to step 2.  Repair or replace the harness.
2 CHECK GROUND CIRCUIT. 
Measure the resistance between MFD connector and chassis ground.
Connector & terminal 
(i122) No. 2 - Chassis ground: 		 Is the resistance less than 10 Ω? Go to step 3.  Repair or replace the harness.
3 CHECK MFD. 
  1. Remove the MFD.
  2. Attach the clock to another vehicle on which the clock display operates normally, and check its operation.
 Is the MFD normal? Repair the poor contact of connector. Replace the MFD.
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